Method and apparatus for removing particulate and vapor phase contaminants from a gas stream

A method for removing fly ash and a vapor phase contaminant from a gas stream, comprising:

• directing a gas stream comprising fly ash and a vapor phase contaminant into a particulate collection device, wherein said particulate collection device comprises a single housing having an upstream collection section comprising an electrostatic precipitator and a downstream collection section comprising a compact baghouse;
• removing at least a portion of said fly ash from said gas stream in said electrostatic precipitator;
• injecting a sorbent into said particulate control device between said electrostatic precipitator and said compact baghouse;
• adsorbing said vapor phase contaminant onto said sorbent to produce spent sorbent;
• and
• removing said spent sorbent from said gas stream in said compact baghouse.

A method for separately removing fly ash and a vapor phase contaminant from a flue gas, comprising:

• removing at least a portion of fly ash from a gas stream to produce removed fly ash;
• collecting said removed fly ash to produce disposable fly ash;
• injecting a dry sorbent into said gas stream after said removing;
• adsorbing a vapor phase contaminant from said gas stream onto said dry sorbent to produce a spent sorbent;
• removing said spent sorbent from said gas stream;
• and
• wherein said removing at least a portion of said fly ash, said collecting, said injecting, said adsorbing and said removing of said spent sorbent are performed within a single housing.

A method for removing fly ash and a vapor phase contaminant from a gas stream, comprising:

• directing a gas stream comprising fly ash and a vapor phase contaminant into a single particulate collection device configured for horizontal gas flow, wherein said particulate collection device comprises an upstream collection section and a downstream collection section;
• removing at least a portion of said fly ash from said gas stream in said upstream collection section;
• injecting a dry powder sorbent into said particulate control device between said upstream collection section and said downstream collection section;
• adsorbing said vapor phase contaminant onto said dry powder sorbent to produce spent sorbent;
• and
• removing said spent sorbent from said gas stream in said downstream collection section.